Need more space but dread the cost and disruption of moving? A loft conversion in Maidstone can add a bedroom, office or en-suite without losing your garden. Prices in 2026 vary a lot, so a clear local number is hard to pin down.
This guide gives you real 2026 costs by conversion type. You will learn what drives the price and what a fair quote includes. We also explain when you need planning permission in Maidstone. By the end, you can judge any quote with confidence.
How much does a loft conversion cost in Maidstone?
A loft conversion in Maidstone typically costs between £25,000 and £70,000 in 2026. The price depends mainly on the type you choose. A simple Velux conversion sits at the lower end. A dormer usually runs £40,000 to £55,000.
| Conversion type | Typical Maidstone cost (2026) | Best for |
|---|---|---|
| Velux or rooflight | £25,000 to £40,000 | Homes with good head height |
| Dormer | £40,000 to £55,000 | 1930s semis and terraces |
| Hip-to-gable | £45,000 to £65,000 | Semi-detached and end-terrace homes |
| Mansard | £55,000 to £80,000 plus | Maximum space, often needs planning |
According to 2026 cost guides from Checkatrade and MyJobQuote, these ranges match the wider UK picture. An en-suite adds roughly £8,000 to £15,000. Premium finishes push the total higher. Your final figure comes down to your roof and your choices.
What affects the cost of your loft conversion?
Several things decide where your price lands. The type of conversion is the biggest factor by far. It can double or even triple the cost on the same house. Knowing these drivers helps you read a quote properly.
Five things drive most of the cost:
- Conversion type: Velux, dormer, hip-to-gable or mansard
- Roof structure: modern trussed roofs need more steel than older cut roofs
- Head height and the size of your loft
- En-suite, plumbing and extra electrics
- Level of finish and quality of materials
Your home’s age matters a lot in Maidstone. Many 1930s semis have traditional cut roofs, which convert easily. Newer estate homes often have trussed roofs, which need extra steelwork. That one difference can change your quote by thousands.
What’s included in a loft conversion quote?
Every fair quote covers far more than the build itself. Cheap quotes often hide gaps that surface later. Knowing what belongs in a quote protects your budget.
Here is what a complete BDC quote includes:
- Structural design and engineer’s calculations
- Steelwork and the new floor structure
- Staircase, insulation and windows
- Electrics, plumbing and plastering
- Building Control fees and final sign-off
These extras usually sit outside the price:
- En-suite bathrooms, around £8,000 to £15,000
- High-end fittings and appliances
- Redecorating your existing rooms
Watch out for a quote that looks too cheap. When one price sits far below the rest, something is usually missing. Steel, Building Control or finishes often return later as extra charges. A clear, itemised quote saves you from nasty surprises.
Do you need planning permission for a loft conversion in Maidstone?
Most loft conversions in Maidstone count as permitted development. That means you often skip a full planning application. Your project must stay within set volume limits. Terraced homes get 40 cubic metres, and semi-detached or detached homes get 50.
Maidstone has a tricky planning map, though. The borough holds dozens of conservation areas and many Article 4 directions. It also covers Green Belt, protected countryside and listed buildings. Homes in these areas often lose permitted development rights and need a full application.
Building Regulations approval is separate and always required. Your loft gains a new floor, staircase and fire escape. These must meet strict safety and energy standards. We handle Maidstone Borough Council Building Control for you, with sign-off included.
Does a loft conversion add value to your home?
Yes, a loft conversion usually adds strong value. Across the South East, a quality conversion adds around 15 to 20 percent to a home’s value. That often beats what the work costs. For many Maidstone families, converting makes more sense than moving.
Moving comes with heavy costs you never get back. Stamp duty, agent fees and legal bills stack up fast. A loft conversion keeps you in the home and area you love. If you need even more room, a single or double-storey extension is another option.
How long does a loft conversion take?
Timelines vary by conversion type. A simple Velux job can finish in around six weeks. A dormer usually takes eight to ten weeks. A mansard runs longer because of the heavy structural work.
Summer is peak season for loft work. Quotes can run a little higher and lead times stretch. Our in-house team keeps your project moving with no subcontractor gaps.
Why choose BDC for your loft conversion in Maidstone?
BDC is a Maidstone-based builder that manages every trade in-house. You deal with one team from the first survey to final sign-off. No subcontractors means no coordination gaps and no hidden mark-ups. Building Control sign-off comes as standard, so your loft is certified and sale-ready.
Local knowledge counts on a job like this. We know Maidstone’s housing stock and its planning quirks. As experienced building contractors in Maidstone, we spot problems early and keep your build smooth.
The bottom line on loft conversion costs in Maidstone
Now you know what a loft conversion in Maidstone should cost in 2026. You can spot a fair, itemised quote and avoid hidden extras. The only way to a firm price is a proper survey of your roof.
Ready to get a firm figure for your home? Book a free loft conversion survey with BDC and get a clear, fixed-price quote. Not sure your roof will work? Send us a photo and we will tell you honestly.
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Q: How much does a loft conversion cost in Maidstone?
A: In 2026, a loft conversion in Maidstone typically costs £25,000 to £70,000. A Velux conversion sits at the lower end, while a dormer usually costs £40,000 to £55,000. Hip-to-gable and mansard projects cost more. A survey gives you a firm, fixed price.
Q: Do you need planning permission for a loft conversion in Maidstone?
A: Most loft conversions in Maidstone are permitted development, so no full application is needed. Your project must stay within volume limits of 40 cubic metres for terraced homes and 50 for semi-detached or detached homes. Conservation areas and Article 4 directions often require planning permission.
Q: What is the cheapest type of loft conversion?
A: A Velux or rooflight conversion is the cheapest, usually £25,000 to £40,000 in 2026. It keeps the existing roof shape and only adds roof windows. This suits homes that already have enough head height and needs the least structural work.
Q: Does a loft conversion add value to a home?
A: Yes. A quality loft conversion typically adds 15 to 20 percent to a property’s value across the South East. That often exceeds the cost of the build. For many Maidstone homeowners, converting is a smarter move than paying to relocate.
Q: Do you need Building Regulations approval for a loft conversion?
A: Yes, always, even when planning permission is not needed. A loft conversion adds a new floor, staircase and fire escape, so it must meet Building Regulations. BDC includes Maidstone Borough Council Building Control sign-off as standard, so your loft is certified.